Deere + Company

The Raymond Corporation

Ryan Philip Lindsay

Alan William Bartels

Dennis Lee Jeffries

Trent Lynn Goodnight

Craig Alan Puetz

Steven D Wallestad

Gary Lee Dostal

Chad W Seuser

Verle W Dau

Chad Weston Seuser

A dual pump hydraulic system is provided for a vehicle driven by an internal combustion engine. The system includes a first circuit with a first high pressure pump supplying hydraulic fluid to the first subsystem at a higher pressure. The system also includes a second circuit with a second lower pressure pump supplying hydraulic fluid to the second subsystem at a second pressure. A first valve controls communication between the first pump and the second circuit. A second valve is operable to communicate the second pump with the first circuit when pressure in the first circuit is less than a second threshold pressure or when commanded by a control unit. A check valve prevents fluid flow from the first circuit back into to the second valve.

Dual pump hydraulic system

A method is provided for adjusting the displacement angles of two hydrostatic units in an infinitely variable hydro-mechanical transmission.

Method for controlling two variable displacement hydrostatic units in an infinitely variable hydro-mechanical transmission

A motorized pallet truck includes an angular indicator on the steering arm mechanism providing an internal controller with an angular position of the steering arm or tiller. The controller applies a brake when the tiller is in either of a substantially vertical or substantially horizontal position, limits the speed of the truck for a predetermined rotational movement from the vertical position, and allows full speed of the vehicle when the tiller arm is pulled into a predefined fast driving arc. The controller further limits the rate of acceleration of the truck when the truck is transitioned between a slow and a fast mode of operation to prevent rapid acceleration in the speed of the truck during the transition.

Pallet truck tiller arm with angular speed mode adjustment and acceleration control

A motorized pallet truck includes an angular indicator on the steering arm mechanism providing an internal controller with an angular position of the steering arm or tiller. The controller applies a brake when the tiller is in either of a substantially vertical or substantially horizontal position, limits the speed of the truck for a predetermined rotational movement from the vertical position, and allows full speed of the vehicle when the tiller arm is pulled into a predefined fast driving arc.

Pallet truck tiller arm with angle detector for speed select

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Moline, IL, United States of America

Ryan Philip Lindsay